Treaty of Trianon

The Treaty of Trianon was the peace agreement of 1920 to formally end World War I between the Entente powers and Hungary, one of the successor states of Austria-Hungary. The treaty defined Hungary as a landlocked state, reducing it to 28% of its former size. 31% of Hungarians (3,300,000 people) were left outside of post-Trianon Hungary, and Hungary's military was reduced to 35,000 officers and men, while the Austro-Hungarian Navy was dissolved. The principal beneficiaries of the treaty were Czechoslovakia (which acquired Slovakia), Romania (which acquired Transylvania), and Yugoslavia (which acquired Croatia). Apart from three villages that were transferred to Czechoslovakia in 1947, post-Trianon Hungary corresponds to the nation's current borders.